How to mock Bundle method in Android Unit-Test?

I have one controller class that handle Fragment creation. Let's say like below:

public class FragmentController {

    public static Fragment newInstance(String title, int total) {
        return total > 0? MultipleDataFragment.newInstance(title, total)
            : SingleDataFragment.newInstance(title);
    }
}

public class MultipleDataFragment extends Fragment {
    public static MultipleDataFragment newInstance( String title, int total) {
        Bundle b = new Bundle();
        b.putString("title", title);
        b.putInt("total", total);
    }
}

public class SingleDataFragment extends Fragment {
    public static SingleDataFragment newInstance( String title, int total) {
        Bundle b = new Bundle();
        b.putString("title", title);
        b.putInt("total", total);
    }
}

In my test (standard Junit4 test class) I have:

@Test
public void testNewInstanceCreteMultipleData() throws Exception {
    Fragment f = FragmentController.newInstance("Hello", 5);

    assertTrue("MultipleDataFragment should be created"
        , f instanceOf MultipleDataFragment);
}

Since I didn't mock the Bundle, I'm getting.

java.lang.RuntimeException: Method putString not mocked.Set

The question is how do I mock the Bundle object so the test can be executed? Do I need static method inside each class that create Bundle object and use that instead or is there a better approach to this?

Any example to this is appreciated.